Which of the following is the most high-risk scenario?

(1 point)

Jim e-mails his friends several times a week.
Jenna posts pictures of the homecoming dance on her website.
Tina texts her friend with her address when inviting her to come over.
Mark posts his e-mail address to gain access to a dozen online gambling sites.

Mark posts his e-mail address to gain access to a dozen online gambling sites.